Cooking-stove.



A. J. LINDEMANN.

COOKING STOVE.

APPLICATION FILED MAYZ, 1914.

Patented Feb. 9, 1915.

8 SHEEN-SHEET 1.

A. J. LINDEMANN.

COOKING STOVE.

APPLIOATION FILED MAY 2, 1914.

Patented Feb. 9,1915.

a SHEETS-SHEET z.

Samar/$1) A. J. LINDEMANN.

COOKING STOVE.

APPLIOATION FILED MAY 2, 1914.

Patented Feb. 9, 1915.

3 SHEETS-SHBET 3.

VIIIIIIII/I/IIII/I Q i 99m 064M082 UNITED STATES PATENT orrion ALBERT J.LINDElVlIANN, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO A. .T. LINDEMANN &HOVERSON (30., 0F MILWAUKEE, WISCONSIN.

COOKING-STOVE.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filed May 2, 1914. Serial No. 835,829.

To all whom it may concern Be it known that I, ALBERT J. LINDE- MANN, acitizen of the United States, and resident of Milwaukee, in the countyof Milwaukee and State of Wisconsin, have invented certain new anduseful Improve,

ments in Cooking-Stoves; and I do hereby declare that the following is afull, clear,

and exact description thereof.

My invention relates to combined solid fuel and gas burning stovesdesigned for baking and over fire cooking, its object being toeconomically provide simple, compact, seam-tight and efiicient stoves ofthe kind stated, each constructedto permit the use of either solid orgas fuel without necessitating the removal or replacement of any of itsparts, and in which both kinds of said fuel may be utilized at the sametime; a novel flue system of the stove serving for ample draft for thecombustion of the solid fuel, gas or both, as well as to economize spacefor chambers in whichare located the gas burners for oven heating andover fire cooking, said flue system being such that none of the productsof combustion of the solid fuel can enter said cham bers.

In view of the foregoing my invention consists in structuralpeculiarities of the combined solid fuel and gas burning stove hereinparticularly set forth with reference to the accompanying drawings andpointed out in the claims of this specification.

Figure I of the drawings represents a vertical longitudinal sectionalview of a. combined solid fuel'and gas burning stove in accordance withmy invention, the section being indicated by line 1l in Figs. 2 and 3;Fig. 2, a cross-section of the stove indicated by line 2-2 in Figs. 1and 3, parts being broken away; Fig. 3, a horizontal section of saidstove indicated by line 3-3 in Fig. 1; Fig. 4, a sectional viewindicated by line H in Figs. 3 and 5, and illustrating a chambercontaining an oven heating gas- I burner; Fig. 5, a horizontal sectionindicated by line 5-5 in Fig. 4; Fig. 6, a View similar to Fig. 4,.omitting the gas-burner and illustrating a combined verticallyadjustable damper and deflector element of said chamber in elevatedposition, and Fig.

7. a horizontal section indicated by line 77 in Fig. 6. v

Referring by numerals to the drawings, 8

- top frame ofan angular combined solid fuel and gas burning stove inwhich my improvements are embodied. The major portion 9 of the bottom ispreferably sheet-steel, and the remainder 9' ofsaid bottom is a somewhatelevated cast-metal housing adjacent to one corner of the stove-body.Each of the walls 10 and 11 of the stove preferably comprises a pair ofparallel steel sheets at a suitable interval apart, and interposedinsulation 13 of asbestos or other suitable material. There ispreferably insulated seamoining of the sheet-metal of the bottom andwalls of the stove, and a continuous depending flange of the top frameof said stove is riveted in between the metal sheets of said walls, allas shown in Figs. 1 and 2, this construction being designed to providejoints that remain air-tight, regardless of expansion and contraction ofthe stovebody.

end wall of the stove-body to increase the area of flue-spacehereinafter more particularly specified. The height of the partition isless than the distance between the bottom and top of the stove-body andits upper end corners with thetop l6of said bake-oven.

Detachablv supported in connection with brackets 17 in the space betweenthe partition 14 and the adjacent end wall of the stove, is a fire-box18 provided with a grate for the support of solid fuel, the grate shownbeing one having shaking-members 19. Within the space below the fire-potit is intended to arrange a'removable receptacle for the reception ofashes from the solid fuel, such a. receptacle being indicated by adotted lines in Fig. 1, and in practice a front doorway and door forsaid space is provided.

A portion of the oven-top 16 is depressedas shown at 16' under acurvilinearportion 20 of an ctherwise horizontal plate 20-thatconstitutes the bottom of a chamber in which to isolategasburners 21,under a grating 22 forming part of the stove top, over fire heatingand'cookingbeing donein receptacles set on the grating over thegas-burners. The bottom curve of said chamber is convenientlyprovidedwith a guide 23 fora trash slide 24 under said gas-burners, andthe chamber bottom has a depending flange riveted in. between the metalsheets of the adjacent end wall of the stove for the purpose stated inthe foregoing with reference to a flange of the top frame of the stove.

The top of the stove over the-horizontal portion ofthe oven therein isshown as comprising twocast-metal plates 25, 26 having interlockingengagement and supported on ing provided at its lower end with outletports in register with ports of a circular plate 30 riveted to saidWall. Pivotally diately abovethe'lower offset 14' of its end" centeredon the plate 30 is a rotatably adjustable damper 31.for the portsaforesaid, the preferredmeans' for actuating the dam per beinghereinafter specified. If preferred, a sliding damper may be employed.

The bottom 15. of the bake-oven is immewall 14 constituting thepartition aforesaid, and extending within the space between the ovenbottom andthe bottom of the stove as a whole is a cast-metalpreferablycylindrical solid bottom. pot 33 constituting a chamber inwhichtoisolatea gas-burner 34. The lower portion of the wall. of the pot, below thestove bottom, is provided withair-inlet ports,' and a damper 35 forthese'inlets is provided'with upper vertical arms 35' for which said notis formed with guide oflsets 33, 33". The pot is provided with upper andlower outer horizontal flanges, and these flanges are riveted inconnection with the oven and stovebcttoms. The upper flange ofthe pctfits within a step of a depression ofthe oven bottom flushwith anotheristep off s'aid depression for the engagement-of a deflector-plate36"attached to the arms 35' ofthe' damper "35, said 'plate being flushwith said "oven bottom when in lowered position. .The links-37 and 38 oftoggles are respectiviel connected to'th'e damper 35 .and to atumbling-rod 39, 39., "which rod .extends. through the offsets 33" ofthe-p ot 33 and. through" "anend wall of the stove under the" to elevatethe damper 35 and deflector plate 36, the flue 29 is opened to. permitcirculation of air through the oven, which oven is heated from within byignited gas emanating from the burner 34. 'lhe. housing 9 is providedwith a guide-boss 9 for the pitman 42, as-shown in Fig. 2, and a bearing'43 "for the tumbling-rodis suspended from the stove bottom, as shown inFig. 3.

.The bottom ofthe pot is notched to provide clearance for the gas-pipe44 in connection with the burner 34, and the damper and plate connectingarms 35 are of such number and disposition as to insure easy verticaladjustment of said damper and plate. There is close fit ofthe pot-bottomon said gas-pipe.

The pot 33 constitutes a ventilating chamber when open, and when closed,theconfined heated air therein prevents chilling of the deflector plate36 that is then a portion of the oven bcttom.

From the foregoing it will be understood that there is flue-spaceextending over the top of the oven then downward and under said oven.This flue-space is open above and below said oven to a back-flue 45. ofthe stove,'said back-flue being of any suitable construction and adaptedfor connection with Stovepipe 45" leading to' a chimney. Theupperopening from the \flue-space in thestovc to the back-flue iscontrolled by a swing-damper 46 fast on an outwardly extending operatingrodv47 for which bearings are provided in said flue, one of the bearings48 being shown in Fig. 2, and the operator end of the rod isconveniently lo-' cated. The flue-damper being open, the products ofcombustion of solid fuel burning in the fire-box 18 have direct outletto the back-flue 45, but said damper being closed, said products ofcombustion travel in said flue-space toward the lower opening therefromto said back-flue, whereby the oven is'heated for baking In theflue-space under the oven is a baffle-plate 49. (shown in Fig. 3)extending from the pct 33 to the back wall of the stove and to the rightof the lower opening from said space to the back-flue, whereby theproducts of combustion of "solid fuel as aforesaid are deflected aroundsaid pot on 2 their way'to outlet.

Because of'the centering of the gasburner 34 under the oven, the pct 33inclosingsaid burner is nearer the offset 14' of the partition 14 thanthe opposite end wall of the stove; v and to] prevent congestion ofproducts of combustion in the narrowest portion of the flue-spaceaforesaid, the stove bottom is there provided with depressions 50 and51, the area of these depressions being suflicient to equalize the cubicinches of said flue-space allaround said pot.

When only solid fuel is used in the stove, the crank 40 is preferablyturned to lower the combined pot-damper 35 and deflectorplate 36, aswell as toiadjustithe damper 31 to a position that cuts off theoven-flue 29 from the main flue-space aforesaid, and to indicate theadjustment of said dampers and deflector plate, the index ,word Coal isshown on the then uppermost side of said crank. The word' Gas may beprovided on the reverse side of the crank 40 to index a reverse positionof the dampers 31, 35 and' the-deflector-plate 36, when the oven is tobe heated by means of gas utilized through the burner 34, or when gas isburned to supplement; the heating of said oven byproducts of combustionof solid fuel circulated in the main flue space.

It is not absolutely essential that the outlet ports of the oven-flue beclosed when solid fuel alone is burned in the stove, as the draft in themain-flue space will be sufficient to prevent said products ofcombustion finding their way through said flue into the oven. Neither isit absolutely essential that provision be had for closing the air inletsto the pot 33 when the deflector plate 36 is lowered. Thedeflector-plate 36 having been l1fted and the gas-burner 34 lighted, theheated air is diverted toward the sides of the oven in which it rises tobe drawn out through the upper apertures of the same into the flue 29and from thence into the main flue space open at the bottom to theuptake back-flue of the stove, said heated air PZISSll'lgfllIlClGI thebottom of said oven where it is again utilized for oven-heating, thisbeing an advantageous economic feature in the use of the stove. Thebottom of the pot being closed immediately below the air-inlets to saidpct, it insures a steady upward current of air under suction created bythe combusticnof gas at the burner 34, whereby downward deflection ofheat is avoided, and the area of said inletsis such that sufficient airis admitted to the pot toinsure perfect combustion of the ignited gas.

The oven is provided with the usual brackets 52 for the support ofshelves 53, and a drop-door for the oven is shown in Fig. 2. The piping54 herein shown 1s that of the stove to which the gas-burners 21 areconnected.

It is to'be noted that the recessing of the oven bottom 15 is such as toprovide for the nesting thereon of considerable surface of the deflectorplate 36, wherebysaid plate in lowered position is readily heated to thegas-burning plate that seats in said oven bottom to cover said chamber,and lifting-mechanism for the plate, said plate serving as a deflectorwhen in ,lifted position. v I i 2. A combined solid fuel and gas burningstove having an oven, a damper controlling an oven-outlet to mainflue-space in the stove, a gas-burner chamber depending from the bottomof the oven, a vertically adjustable deflecting plate constituting acover for said chamber when lowered, and means by which to effectsimultaneous adjustment of said damper and plate, the damper being movedto open said oven outlet when the plate is elevated.

3. A combined stove having an oven provided with a vertical flueupwardly open thereto, a damper controlling a lower outlet of the flueto main. flue space in the stove, a gas-burner chamber depending fromthe bottom of said oven, a verticallyadiustahle deflecting plateconstituting a cover for said chamber when lowered, and means by whichto effect simultaneous adjustment of said damper and plate, the damperbeing moved to open said flue when the plate is elevated.

4. A combined solid fuel and gas burning stove having an oven, a gasburner chamber depending from the oven bottom and'provided with lowerend air-inlets, a vertically adjustable damper for said air-inlets, adefleeting plate movable with the damper, the plate constituting a coverfor said chamber when lowered; and means for adjusting said connecteddamper and plate.

5. A combined solid fuel and gas burning stove having an oven, a dampercontrolling an oven outlet to main flue-space in the stove, a gas-burnerchamber de ending from the oven bottom and provided with lower end airinlets, a vertically adjustable damper for said air-inlets and adeflecting plate movable therewith, the plate constituting a cover forsaid chamber when lowered; and means by which to effect a simultaneousadjustment of said dampers and plate, both solid fuel and gas burning vtumbling-rod in toggle union with the chamber-damper, a lever rigid withthe rod, and a pitman connecting the lever and the damper firstaforesaid.

7. A combined solid fuel and gas burning stove having an oven, a dampercontrolling an oven outlet to main flue-space in the stove, a gas-burnerchamberdepending from the oven bottom and provided with lower end airinlets, a vertically adjustable dams per for said. air-inlets and adeflecting plate movabletherewith, the plate constituting a cover forsaid chamber when lowered; a

tumbling-rod in toggle union with the chamber-damper lever rigid withthe rod, a

, pitman connecting the lever and the damper first aforesaid, 'and anindex-crank fast on an exposed portion of said rod.

8. A combined solid fuel and gasbur-ning stove having an oven providedwith a vertical flue upwardly open thereto, a damper controlling a loweroutlet of the flue tomain flue space in the stove, a gas-burner chamberdepending from the oven bottom 1 and provided with lower end air inlets,a

vertically, adjustable damper for said airinlets and a deflectingplatemovable therewith, the plate constituting a cover for said chamberwhen lowered; and means by which to-effect a simultaneous adjustment ofsaid dampers and plate, both dampers being in open position when theplate is elevated.

9. A combined solid fuel and gas burning stove having an oven providedwith a vertical fiu'e upwardly open thereto,a damper controlling a loweroutlet of the flue to main flue space in the stove, a gas-burner chamberdepending from the oven bottom and provided with lower end air inlets, avertically adjustable damperfor said air-inlets and a defleeting placemovable therewith, the. plate constituting a cover for said chamber whenlowered; a tumbling-rod in toggle union with the chamber-damper, a leverrigid with the rod, and a pitman connecting the lever I and theaforesaid flue-damper.

10. A combined solid fuel and gas burning stove-having an oven providedwith a vertical flue upwardly open thereto,a damer controlling a loweroutlet of the flue to main flue space in the stove, a gas-burner chamberdependin from the oven bottom and provided with lower end air inlets, averticallv ,adiustable damper for said airinlets and a deflecting platemovable therewith. the late constituting a cover for said chamber whenlowered; a tumbling-rod in toggle union with the chamber-damper, a leverrigid with the rod, a pi-tman connectingthe lever and the aforesaidflue-damper,

and an indexed crank on t e outer end of said rod.

11.,A combined SOlld fuel and gas burning stove having an oven, a'gas-burner chnmberadepending from the bottom of the adjustabledeflecting plate surmountmg arms engaging said guides and constituting acover for said chamber whenlowered, and means for adjusting the plate.

12. A combined solid fuel and gas burning stove having an oven, a gasburner central of the oven below the same, a chamber in the form of apotinclosing the burner, the air inlets to the pot being under the stovebottom and said pot provided with guide offsets; a verticallyadjuist'able damper for said air-inlets provided with arms engaging saidguide-oflsets of the pot, a deflecting-plate in connection with saidarms and which seats in the oven bottom to constitute a pot-cover whenlowered, and means for adjusting the connected damper and de- 7 fleetingplate. I

13. A solid fuel and gas burning stove having an upper gas-burnerisolating chamber the bottom of which-is a partly horizontal and partlycurvilinear solid plate fashioned at the upper extremity of its curve toform a ledge upon which to rest a removable top-plate of the stove,whereby the plate first aforesaid constitutes a supplementary part ofthe top-frame of said stove. I a I 14. A solid fuel and gas burningstove having an upper gas-burner isolating chamber, the bottom of whichis a partly hori zontal and partly curvilinear solid platein air-tightunion with a wall of the stove and fashioned at the upper extremity ofits curve to form a ledge upon'which to rest a supplementary part of thetop-frame of sald stove.

16. A combined solid fuel and gas burning stove having an oven, :1gas-burner chamber having an upper outer flange thereof seated in a stepof a depression of the oven bottom flush with another step of saiddepression, a plate that seats in the upper step of the aforesaiddepression to coversaid chamber and be flush with said oven bottom, andlifting mechanism for the plate, said plate serving as a deflector whenin lifted position.

17. A stove having an oven, a gas-burner chamber depending-from the ovenand pro- Vidd with lower a'ir inlets, a damper for chamber when lowered,and means by which to'simult'aneously adjust the plate and damper withreference to circulation or noncirculation of heat in said oven.

19. Acombined 'solid fuel andgas burning stove having an oven, agas-burner chamber having communication with the.

oven through the .bottom of the same, a

. movable plate in the oven over the chamber, and raising and loweringmechanism l connected to-the plate, said plate in raised positionserving as a,deflector for gas-fire and in lowered position as a closurefor the upper end of said chamber to adapt the oven for baking whensolid fuel is used in the stove. I

20. A combined solid fuel and gasburning stove having an oven, a'gas-burner.

chamber having communication with the oven through the bottom of thesame, a movable plate in the oven over the chamber, and plate raisingand lowering mechanism under control outside of the stove,

said plate in raised position serving as a de flector for gas-fire andin lowered position as a closure for the upper end of said chamher toadapt the oven for baking when solid fuel is used in the stove.

' 21. A combined solid fuel. and gas burning stove having an'oven, anair-chamber.

crossing flue-space in the stove under the ','oven, a burner in thechamber, a gas-pipe connected to the burner, a movable cover for saidchamber, and cover raising and lowering mechanism under control outsideof the stove, said cover in raised position serving as a deflector insaid oven for products of combustion from the underlying burner. v

22. A combined solid fuel and gas-burning stove having an oven and agas-burner chamber crossing flue-space in the stove under the oven. thechamber being closed at the bottom and provided with an air-inlet orinlets at itslower end, amovable plate in the oven over the chamber, andraising and lowering mechanism connected to the plate, said plate inraised position serving as a gas-fire deflector and in lowered posi-'tion as aclosure for the upper end of the aforesaid chamber.

23. A combined solid fuel and gas burning stove having an oven, agas-burner chamber depending from the bottom of the oven acrossflue-space in the stove, a movable support, means for verticallyadjusting thesupport, and a plate in connection with the support to beraised and lowered in said oven, the plate in raised position servsitionserving as a gas-firedeflector and in {)owered position as a cover forsaid cham- 25. A combined solid fuel andgas burning stove having anoven, a gas-burner chamber having communication with the oven, a movableplate in-the oven, and mechanism in connection with the plate by whichsaid plate is made to serve as a gasflre deflector in one position ofits adjustment and as a closure forsaid chamber in another position ofits adjustment.

26. A stove which is convertible for solid and fluid fuel, comprising anoven, a the pot, fines for conducting the products of combustion fromsuch fire pot under and around 'said oven, a burner for fluid fuel 10-cated beneath said oven, the floor of said oven being provided with anopening above I said fluid fuel burner for admitting flames therefrominto the oven, and a combined valve and baflie plate for controllingsaid opening, said valve and bailie' plate being movable above andeither toward or from the upper end of said opening to close or open it.

27-. A stove which'is convertible for solid and fluid fuel, comprisingan oven, a fire pot, fiues for conducting the products of

